Grease-gun.



is. P. TOWNSBND.

GREASE GUN. APrLIoATIoN FILED mm: 12; 190e.

- Patented oen/1, 1910.

MMIII UNITEn sTArEs SAMUEL nm'rowNsEND, or` ORANGE, NEW amsn". 'A

GREASE-GUN.

One object of my invention is to provide a portable device particularly designed for .use in applying a semi-liquid or solid lubricant to the otherwige inaccessible parts ofmachinery, and particularly to that class of machinery found on motor vehicles.

Another object of the invention is to prov'ide a portable device whereby solid lubricant may be forcibly injected into such parts of a machine a`s requirethe same; the construction of the device being such that it may be filled withv lubricant and operated with little or no loss orescape of the same.

I further desire to provide a hand operated pump or syringe particularly adapted for use of solid lubricant, and which shall be of such a nature that its plunger, while longitudinally movable within its cylinder, 'shall be kept from turning as it is' moved forward.v y

I also desire to provide a device of the general lcharacter above noted which shall be of a substantial construction and relatively inexpensive to manufacture.

These objects and other advantageous ends I secure as hereinafter set forth, reference being had to the accompanying drawings, in which Figure 1, is a side elevation of my grease gun, showing its two principal parts as slightly separated; Fig. 2, is an inverted horiZontalsect-ion taken on 'the line 2 2, Fig. l; Fig. 3, is a vertical'section of a part of the. inner cylinder of the device, showing the piston in position therein; 'and Fig. 4, is a. perspective view of the piston, illustrating its detail construction.

In the above drawings A represents a metallic cylinder closed at one endand having mounted in'said end a nozzle a of any desired shape and length. The opposite end of this cylinder is threaded, preferably on its exterior surface, as indicated at a, and ts into a correspondingly threaded portion of a cap or head?) of a second cylinder B; said second cylinder being-of smaller diameter than the first and of such a diameter as to closely fit within the same. The length ofsaid two cylinders substantially equal and a portion .of the cylinder B is cut Specication of Letters Patent.

application med Julie 12,

tudinal movement.

190s. serial No. 438,154.

away as indicated at b2 to form an opening which extends practically the entire length of the cylinder and inthe present instance has a width somewhat less than the diameter PATENT j.

Patented Oct. 4, 1910.

of said cylinder. The cap'b. isv so fixed to the inner cylinder B as to extend over the same, belng flanged as shown to-form an annular recess for the reception of the thread- 'H--ed end a of the outer cylinder A. Said cap @has its exterior surface milled or otherwise roufrhened as indicated to provide ai hand hold when it is desired to screw together the two cylinders. A screw C passes centrally through a boss c of the head or cover b and is free to turn, while 'being held'from longi-v c lTo the,extreme `outer end of this screw is pinned or otherwise fixed a crank handle made in two parts c and @2, hinged together so that the part c2 may be folded overthe part o', when the device is not in use, s'o that it does not pro-- ject appreciably beyond'the sides ofthe cylinders. f

Mounted upon the screw Gis a piston or plunger D having its hub cl provided with a threaded passage in which said screw ts. The piston 1n turn closely lits the interior'of the cylinderB and is provided with a projecting portion d which lits into the opening b2 1n the side of the said cylinder B..-

The amount of the projection of the part d is such that it not only lits the opening b2, as above noted, but extends practically into engagement with the inner surface of the cylinder A so that the piston D prevents the passage of material from one of its sides to the other. IVliile said piston may be constructed' in a number of ways, I preferably recess a portion o-f one of its faces as. illustrated in Fig. i, and place therein a segmental plate E, having a projecting edge (Z and held to the body of thepiston by SCI'CWS 6.

Vhen it is desired to,fill the device with grease, the cylinder A is unscrewed from the cap or cover b and is pulled ofi' of the inner cylinder B, thereby exposing the open-y ing in the side thereof. The piston D is then moved to the cap end of ,the cylinder B by turning the crank handle, after which the solid or semi-solid lubricant is introduced into said cylinder which when filled is en- -tered into the cylinder A; the two being screwed together as above indicated. Thereafter the turning of the crank handle will result in a turning of' the screw C and ina-S- much as the 'piston D is prevented from turning in theA cylinder B by reason of its projecting portionJcZ which also prevents the passage of the grease by it, the grease is forced out of said cylinder.

1. A grease gun consisting of a cylinder having in its side an Opening for 4the introduction of material and provided with an outlet, a piston in the cylinder having means to prevent the escape of material past its edge through t-he opening in said cylinder, means for causing the piston to move longitudinally of the cylinder, and a cover for said opening Iin the cylinder, said cover being mounted on the cylinder so as to be free torotate when it is applied to or removed therefrom.

2. The combination of two cylinders con# structed to fit together, one cylinder having an elongated side Vopenlng vextending the greater part of its length and normally' closed by the other cylinder', a nozzle for one of the cylinders, and means including a piston -extending into the side opening of said cylinder for expelling the material in the cylinders through said nozzle.

3.- The combination in a. grease gun of two cylinders fitting together, of which the inner one is provided. with an elongated opening, a piston having a projection extending through the opening of theiinner cylinder into engagement with the inner wall'of the outer cylinder, means for causing saidvpiston to -move longitudinally through the cylinder. and a nozzle for the outer cylinder.

4. The combination of two cylinders capable of fitting together, one having a nozzle, and the other having a threaded cap for the reception ofthe first cylinder, the inner one of said cylinders having an elongated side opening, a screw extending axially of the cylinders, means for turning said screw, and a pist-on mounted on the screw and extendable portion provided with a projection tting the opening in said inner cylinder, means for turning the screw, and a nozzle .for one of said cylinders.`

6. The combination of a cylinder having 'a nozzle and provided with a. screw threaded portion, a second cylinder fitting the first and provided with av longitudinally extending opening in its side, a cap for said second cylinder having a threaded annular recess for the reception of the threaded portion of the lirst cylinder, a screw extending axially of the cylinders, a piston attached to the screw and extending int-o the opening in the inner cylinderso as to prevent the es- `cape of material from oneface to the other of said piston, and a handle for turning the screw.

7. The combination in a grease gun of two cylinders removably fitting one within the other; the inner cylinder having alongitudinally extending opening; a piston in said inner cylinder having a portion extending into the opening whereby revolution of said piston is prevented; 'a revoluble screw held from longitudinal movement and passing through said piston; with means for turning said screw to move the piston longitudinally within/theic/ylinders.

In'testimy whereof, I have signedr my name to this specification, in the presence of two subscribing witnesses.

lViLLIAM T. Sion-ER, YILLIAM PARROTT.' 

